Tooth or dental clamp.



- No. 678,l82. Patented July 9, 19m.

J. w. IVORY. TOOTH 0B DENTAL CLAMP. A lication filed Aug. 3, 1900.

(No Model.)

UNITED STATES PATENT Orsrcn.

JAMES W. IVORY, OF PHILADELPHIA, PENNSYLVANIA.

TOOTH .OR DENTAL CLAMP.

SPECIFICATION forming part of Letters Patent No. 678,182, dated July 9, 1901 Application filed August 3, 190i)- Serial No. 25,825. (No model.)

To all whom it may concern.-

Be it known that I, JAMES W. IVORY, a citizen of the United States, residing in the city and county of Philadelphia, State of Pennsylvania, have invented a new and useful Improvement in Tooth or Dental Clamps, which improvement is fully set forth in the following specification and accompanying drawings. My invention consists of an improvement in a tooth-clamp having a jaw adapted to be pressed against the gum and moved or shifted so as to uncover or expose a marginal cavity of a tooth or for other purposes and then con trolling said gum, the novel features being hereinafter described, and pointed out in the claims which follow the specification.

Figure 1 represents a perspective view of a tooth-clamp embodying myinvention. Figs.

2 and 3 represent views of opposite faces thereof. tion thereof. nal section of a modification. Fig. 6 represents a face View of the clamp provided with a supplemental jaw. Fig. ,7 represents a longitudinal section thereof.

Similar letters of reference indicate corresponding parts in the figures.

Referring to the drawings, A designates an Fig. 4 represents a longitudinal secarched frame. having a jaw B at the crown thereof.

0 designates the shank of said frame, the same having mounted thereon at the outer end thereof the screw D, which is swiveled on the shank E of the opposite jaw F, it be-- ing noticed that said shank E has a longitudinally-extending slot G therein to receive the swiveled end of said screw D, whereby said end may have a certain play in said slot.

H designates a post which serves to con-- nect the shanks O and E, forming somewhat of an axis for the jaws B and F, said post having heads on its opposite ends, whereby it is prevented from disconnection, it being noticed that the shank G has a series of connected openings J therein, and the post is formed with the neck K, whereby by manipulating said post so that the neck thereof receives the Walls of the opening J the post may be fitted in either of the openings J, while the opposite end of the post is adapted to move in the slot G of the shank E, the swiveled end of the screw also yielding, whereby the ad- 5 represents a longitudi-- justment of the jaws may be readily accom plished.

It will be noticed that the post H forms a free connection for the shanks of the jaws and is adapted to vary its angle or oscillate as the jaws are shifted in order to effect their ad justment on the tooth, and when the adjust= ment is accomplished the screw D is properly rotated. t

It will be seen that when the jaws are properly located on the labial and palatal or lingual sides of a tooth and the clamp is properly tightened by'the screwD the jawB may be moved or shifted, so that as it bears against the gum it may uncover or expose a marginal cavity which may exist in said tooth and then control the gum in the position it occupies, it being evident that owing to the oscillating nature of the post H and the seating of the swiveled end of the screw in the slot'Gr the jaw B is adapted to have the aforesaid motion imparted to it without disturbing the jaw F in its hold or engagement with the neck of the tooth. y

In Fig. 5 the construction of the parts is similar to that hereinbefore described, excepting that the shank E is provided with a series of recesses L, in either of which the point of the screw is freely seated, thus permitting the screw to oscillate in the adjustment of the jaw.

In order to obtain increased holding action of the clamp on a tooth, I employ the supplemental jaw M, which bears against the face of the tooth adjacent to the jaw B and has its shank N formed with a longitudinallyextending slot P, through which pass the post H and the screw D, it being noticed that the back of the jaw M contactswith the base of the frame A, and the shank N, which is deflected from said jaw, bears against the shank E, whereby when the screWD is properly-rotated to tighten the clamp on the tooth the jaw M is also firmly pressed against the tooth, providing an additional connection for the clamp with thetooth, while permitting the jaw B to be moved to uncover the marginal cavity without necessarily disturbing said jaw M, at least to any appreciable extent.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A tooth-clamp having jaws, carriers on the same, a tightening device for said jaws, and a post which is separate from said tightening device and freely fitted in openings in said carriers and adapted to oscillate in the motions of either jaw.

2. In a tooth-clamp of the order described, a pair of jaws, slotted shanks carrying the same, the slots of one shank being in series, a tightening device on said shanks for closing said jaws and a post which is independent of said device and connected with said shanks and freely occupying the slots therein, said post being also provided with a neck, whereby it may be seated in either of the slots of the respective shank.

3. In a tooth-clamp of the character stated, a pair of jaws, a supplemental jaw interposed between the same, a tightening device for said jaws and an oscillating post which is mounted on the shanks of said jaws separate from said device.

4. In a tooth-clamp, a pair of jaws and l means for tightening the same, in combination with a supplemental jaw which is interposed between the members of the former 

